Improvement in powder-kegs



UNITED STATES NELSON TENNEY, OF PORTLAND, MAINE.

IMPROVEMENT IN POWDER-Kees.

Specification forming partof Letters Patent No. 146,150, dated January 6, 1874; application filed November 19, 1873.

To all whom t may concern:

v Be it known that I, NELsoN TENNEY, of

Portland, in the county of Cumberland and State of Maine, have invented certain new and` useful Improvements in Iowder Kegs; and` I do hereby declare that the following is a full, clear, and exact description thereof, thatwill enable others skilled in theart to which it appertains to make and use the same,`

reference being `had to the accompanying drawings and to the letters of reference marked thereon, which form a part of this specification.

Figure 1 shows a vertical section ofcan,

illustrating my method of fastening the head,

the can, so as to form what istermed a dou' ble seam.77`

I do not claim, broadly, the brmation of a double seam, because this has been done before, and I am aware that a particular method of effecting this object is described in Letters Patent No. 24,7 72, July 12, 1859, and I do not claim` this particular method.

I rst construct the walls or cylindrical part of my can with an outwardlyprojecting shoulder at each end, designated by a. This extends around the entire circumference. Above this shoulder, and of the same material as the walls of the can, rises the vertical iiange b. Upon this shoulder a I then place the head c of the can, which has simply a right-angled iiange around its periphery, illustrated at d. This ilangcd is, as illustrated, less in width or height than the iiange b, formed from the walls of the can. The position of the parts when thus rst placed together is illustrated at A. The rst step in the formation of the seam is illustrated at B, and consists in folding the wider iiange b down over the top of the naring edge thus formed is again bent, and doubled y downupon itself.

Let it be observed that all these motions or bendings of the flanges of both the can and wall, and the vcan-head, are made inwardly,

and the seam is formed on the inner periphery 3 of the can-wall projecting above the can-head. This is different from Patent No. 24,7 72, before referred to, and has advantages over the same, to wit, first, the exterior of the can, opposite the point where the head is inserted, is

smooth, with the exception of the slight projection or shoulder a,- second, the recess or the distance of the can-head below the upper edges of the can-wall is obtained with a plain flat head, without the expense of indenting or sinking in the same in concentric circles, as is the ease in the patent referred to.

I do not claim a method of donble-seamng the heads of cans, shown in W. Hills Patent No. 108,591, of 1870, which consists in lapping the top of the wall of the can over the flange y of the he'ad, and then inclinin g the twoinward` y u at an angle of forty-five degrees.

What I claim as my invention, and desire to secure by Letters Patent, is- Y In the formation of a double seam for holding the heads of cans, the combination of the shoulder a and head c with its flange d, the

same, when placed together, being bent or` v folded inwardly, as illustrated at B and C, as described. i

In testimony that I claim the foregoing I have hereunto set my hand this 12th day of f November, 1873.

`NELsoN TENNEY.

Witnesses."

FRANK 1I. J ORDEN, WM. HENRY CLIFFORD.

PATENT OEEIcEo 

